Improvement in lathes



N. PETERS, PHDTO-LITHGGAPHER, WASHINGTON D C SMUEL u. urne, or Wannsee, VERMONT.

Letters Patent No. 109,912, dated December 6, 1870.

IMPROVEMENT iN LATHES.

The Schedule referred to in these' Letters yPatent and making part of the same,

To all pers-ms to whom these presents may como:

Be it known that I, SAMUEL U.`KING, of Windsor, of the county. of Windsor and State of Vermont, have invented an improved Machine for Rounding Crooked or Tapering Sticks; and do hereby declare the saine to be fully described inthe following specification and represented in the accompanying drawing, of which- Figure l denotes a front elevation;

Figure 2, a side elevation;

Figure 3, a rear elevation 5 and Figure 4, a vertical and longitudinal section of it.

Figure 5 is a front view; and

Figure 6,' a section ofthe rotary head or reducer. This latter ligure shows the lever that is within such head, and serves to operate the ring or annulnsfof the head.

In carrying out my invention l combine with the .mechanisms-tor feeding the stick (or scythc-snath blank, for iustance,) and reducing or rounding it, a mechanism, substantially as hereinafter described, for regulating, by the movement of thc stick, the inward movement ofthe stick, guides, and cutter, the object of such being to prevent the stick, incase of stoppage ofthe feeding mechanism, from being improperly cut or reduced, the stock, guides, and cutter ceasing to move inward, and stoppage of the feed ofthe stick, they being controlled by the action of thc stick.

In the drawingy A A denotes the frame of the machine, as provided with a rotary cutter-head, B, whose tubular journal, a, isisupported in a stationary box or bearing, b. l

Three bent levers, C C C, are pivoted to the front end of the said head, and are arranged to cross one another, in manner as shown. Their pivots or fulcrums are represented at c c c.

Each of the levers at its free end extends between a pair of studs, l d, extended from a ring, D, which turns on and is concentric with the hea-d.

O11 one of the levers there is fixed a cutter, E, for reducing the stick. By turning the ring ou the head the levers may bc made to contract or expand relatively to each other.

In front of the cutter-head aud the set of levers or stick-guides C C C is a pair of flut-ed feed-rollers, ll, F, whose shafts at two next adjacent ends are supported on levers G G, provided with a connection-spring, H, the same being so as to enable the feed-rollers to move apart and grasp firmly and accommodate themselves to a stick when introduced between them andinto the cutter-head. .At their other ends the two feed-roller shafts are supported in stationary hearings, and there is a gear, [1',lixed in the upper of such shafts.

The said gear. rl engages with a pinion, c, fixed on lanother shaft, f, arranged as represented.

Atiendless belt, g, going around a wheel, h, fixed t-i'on', thereby causing rotary motion to be transmitted tothe uppertbed-rollerE.

The roller F, though termed a feed-roller, does not perform the function of feeding the stick into the cut-J i ter-heini, but serves rather to support it and press it up to the upper' roller, which is essentially the feedingroller.

'lhere is fixed ou thc shaft of the lower feed-roller a worm, h',.which engages with a worm-gear, Z,- fixed on along shaft,`m, arranged as represented.

The shaft in is provided with a helical groove or screw, as shown at n, and also with all adjustable collar or head, o, thc lat-ter boing fixed in place by a setscrew, 1).

A short lever, G', pivoted to a longer level', H', (see figs. 2 and 3,) enters the helical groove.

At its free end the lever .G vhas a lifter-spring, p', that extends down from a standard, Q, erected on the free end ofthe lever H'.

Furthermore, there is on and-pivotcd to the level' H a lever-catch, I, which is formed and arranged as represented, its purpose heilig to project over the lever G and hold it in engagen'ient with the helical groove, which it will by the action of a spring, r, fastened at -one end to the lover H', and at the other to the tail' of the lever-catch. But when the helical groove, by the revolution of its shaft, moves the levers Gr and H so as to force the tail ot' the catch-levcr against the collar or bend 0, the said catch-lever will be turned oli" the lever Gr', so as tocnable the spring p' to raise it out of engagement with the helical groove.

The lever H, pivoted as represented, is pivoted at one ,end to 'the frame A, or has a vertical shaft, t, for its fulcrum.

An anuulus, K, arranged to slide freely on the box or bearing-of the journal of the cutter-head, is connected with the lever H by two arms, u Iu., pivoted to the lever and extended from thc annulus.

rlhe said annulus is to operate a bont lever, L, pivoted to the inner periphery of the cutter-head, and having one arm extending into a recess in the ring D, hereinbcfore mentioned.

An endless belt, Mgoing around the cutter-head and a wheel, N, xed on the driving-shaft, serves to aid in revolving 'the cutter-head.

A snathblank or other stick to be rounded is to be introduced huit foremost between the feed-rollers and into the outter-hcad and the lever-guides of the latter, after which thc'lever Il is to be moved so as to cause the euides to oras the stick and bring thc' cutter in contact with.it. The lever G' being next thrown into engagement with the helical groove, and the upper feed-roller and the cuttcr-hcad being put in rcvolu tion, the stick will be'fed along through the heathand will be rounded in the meantime. .lhe guide-levers O C G, by the action of the annulus K, the lever L, and the ring D, will be caused toy gradually closenpou the stick as it`may progress, thereby supporting it, the

cutter being in the meanwhile brought in contact with,

the st-ick, so as to effect its reduction.

Finally, after the stick may have been'nearly rounded, the catch-lever I, by being carried in Contact with with the head or collar o, will be forced olf thelever G', thereby allowing lthe spring p to raise it ont ofen- `gagement with the helicalV groove, in' which case the further reduction of the stick will cease.

From the above it will he seen that the lower feedroller will be turned entirely by the stick, and when the latter may cease its forward movement the said lower feed-roller will cease to revolve. It will also be -observed that the lower feed-`roller 1composee pmt of the mechanism for operating or contracting'the guides and cutter upon the stick. per feed-roller cease to revolve, or the feed of the. stick he interrupted from any cause.; there can he no contraction ofthe guide-levers and the cutter upon the stick, and,'consequently, no reduction of the stickI so long. as the feed may be arrested.

1t frequently happens in other machines for rounding seythe-snat-hs that, duringinterruption ot' the feed ot' the stick or snath, therewvill he no interruption 'of Therefore, should the i1p-;

the feeding ofthe cutter, in consequence of which the stick'will be improperly grooved,or nearly severed 4 transversely.

.The object of my invention is to prevent accident or injury to the stick.

1. In combination with the upper feed-roller E and such an.

its operative mechanism, and with the cutter-head B and the guide-levers C O C and `cutter Ethereof, as.

described, a mechanism, substantially as specified, (or its equivalent-,) combined-,with the lower feed-roller,

and to operate with each -for contracting the guide` 'levers and knife upon the stick, by rotary motion imparted tothe lower feed-roller bythe stiek'while be# ing fed along by the upper feed-roller, as explained, the said mechanism consisting ofthe ring D, the bent lever L, the annulus K, the levers G H', the helical groove'u, the catch I, collar '0, springs p' fr, worm 7:, and worm-gear l, all arranged as specitied, l

i 2.4 The combination, as described, for e'eeting con# traction of'` the guide-levers and cutter by the action of the stick on the lower feed-roller, while such stick may he in the act of beingr fed along bythenpper SAMUEL- U. KING, Witnesses:

It'. H. EDDY, SN. PIPER. 

